Ron. I don't know what if anything goes up the big shaded corner in the center of your photo, but I don't think it is Portal. I think Portal splits the middle of the clean face to the left of the big dihedral.

PORTAL II 9 *
FA: Stan Shepard and Bob Boucher (II 5.9 A1), 1963.
This route follows the vertical, left-facing dihedral to the right of Stromboli and is one of the best routes on the Ship's Prow. Begin in the Stromboli Chimney.
1. Climb past grassy ledges and a chockstone, then traverse right to a big ledge at the base of the dihedral (6, 130 feet).
2. Stem and jam the steep corner past some fixed pins to a sloping ledge (9, 100 feet).
3. Continue up the corner to a ledge at the base of a chimney (9, 100 feet).
4. Climb the chimney followed by an overhanging offwidth section and continue to the top of the face (9, 130 feet). It also is possible to climb the face to the left of this last section.

What do you think?

Best Regards.

Richard

Agreed Richard. The right-facing shaded corner is a bit of a choss-pile, and is usually wet at that. The description page for Portal is on the site. If people want beta photos of the routes on Ship's Prow up, I've done several of them and can scan in the slides and post them.